699859 has 4 divisors (see below), whose sum is σ = 702616. Its totient is φ = 697104.

The previous prime is 699823. The next prime is 699863. The reversal of 699859 is 958996.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 699859 - 2¹⁵ = 667091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (175654).

2⁶⁹⁹⁸⁵⁹ is an apocalyptic number.

699859 is a deficient number, since it is larger than the sum of its proper divisors (2757).

699859 is a wasteful number, since it uses less digits than its factorization.

699859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756.

The product of its digits is 174960, while the sum is 46.

The square root of 699859 is about 836.5757586734. The cubic root of 699859 is about 88.7844381328.

The spelling of 699859 in words is "six hundred ninety-nine thousand, eight hundred fifty-nine".